1 1/2 tablespoons butter
16 ounces cream cheese, softened
1/3 cup coffee-flavored liqueur
1/4 cup milk
1/2 cup sour cream
1 1/2 teaspoons lemon zest
1 tablespoon vanilla extract
Preheat oven to 350 degrees F (175 degrees C).
Mix the butter and cream cheese well. Mix in coffee liqueur and milk.
Beat cream cheese and sour cream into the butter mixture alternately with lemon zest and vanilla extract, and pour mixture into pie crusts.
Bake in preheated oven for an hour. Cool completely.